\sqrt{\left(\left(\frac{\left(a + b\right) + c}{2} \cdot \left(\frac{\left(a + b\right) + c}{2} - a\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - b\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - c\right)}double f(double a, double b, double c) {
double r103122 = a;
double r103123 = b;
double r103124 = r103122 + r103123;
double r103125 = c;
double r103126 = r103124 + r103125;
double r103127 = 2.0;
double r103128 = r103126 / r103127;
double r103129 = r103128 - r103122;
double r103130 = r103128 * r103129;
double r103131 = r103128 - r103123;
double r103132 = r103130 * r103131;
double r103133 = r103128 - r103125;
double r103134 = r103132 * r103133;
double r103135 = sqrt(r103134);
return r103135;
}